Connecting plug



Sept. 1, 1925. "1,552,227

L. G. PACENT CONNECTING PLUG 'Filed May 4', 1923 A TTORNE Y5 Patented Sept. 1925.

JUNITED v STATES PATENT OFFICE. I

ouis G. PACENT, or wINrI Ln nw YORK, ASSIGNOR T rAcnN'r ELECTRIC cou- ,IANY, INQ.,1OF NEW YORK, N. Y., A CORPORATION OF NEW Yonx.

CONNECTING PLUG.

Application filed May 4,

, and use the same.

This invention has to do with devices for making electrical connections, and, more particularly, devices of the spring connecter type; Specifically, the invention is directed to improvements in connecting plugs of the telephone type espeilally adapted for easy connection and disconnection to and from the terminals of a telephone cord or the like. a At the present time the'invention finds its most important embodiment in telephone plugs for use in conjunction with radio apsairatus. Radio telephone headsets are orinarily provided with conductor cords having so-called pin type cord tips, which,

of .course, are not adapted for making connections with spring jacks but are well adapted for making connections with certain types of binding posts and spring clips such as the well-known Fahnestock clips.

Because of thefact that it is frequently de- ,sirab'le to connect a telephone headset with binding posts and the like, especially for experimentalv and testing purposes, it is undesirable, in many cases, to have the headset permanently connected to the plug. The

structure of the present invention is designed to meet this situation in that it provides a plug to which a cord provided with 'the usual pin type cord tips can be quickly and easily connected and disconnected and in which the entire mechanism for effecting such connections is mounted inside the handle of the plug.

626,285, filed March 20, 1923 and Serial Nd; 618,887, filed February 1 4, 1923, telephone plugs adapted for connection with telephone cords provided with pin type cord tips are disclosed. The present invention is in certain respects, an improvement on the plugs described in the aforementioned copending applications. 1

, he improvement effected by the present inventionresideslinjhe provision of-a plug In my copending applications Serial No.

1923. Serial No. 836,712.

combining extreme simplicity and correassemble the handle in orderto connect or bly of-the handle, but it is somewhat more expensive to manufacture than the former.

Plugs in accordance with the present invention combine the advantages of both the aforementioned plugs in that they are little,

,if at all, more expensive to manufacture than the first and are substantially as convenient as the latter from the standpoint of ease in connecting and disconnecting the cords.

The plug constituting the preferred embodiment ofthe present invention comprises the usual coaxial tip and sleeve conductors to each of which is connected a conducting member in theform of a leaf spring having its free end portion apertured to receive a pin type cord tip of the standard size. A two-piece hollow handle of insulating material is provided inside of which the con- ,dircting members are disposed. Each of the two parts of the handle is provided with a slot of such shape as to define a hook-shaped projection or shoulder integral with the handle. These slots are respectively disposed adjacent the free end of one of the conducting members, andeach is so proportioned as to permit the insertion therethrou'gh of a pin type cord tip into the aperture in the associated conducting member and to further permit manipulation of the cord tip into a position inside the hook of the shoulder wherein the cord tip is gripped bythe conducting 'fnember and shoulder conjointl When thus inserted the cord tips are firm y held and cannot be withdrawn by a direct pull on the cord. They can, however, be

readily disconnected by a reverse manipul.

are

- the assemble tion which is equally as simple as the operation of inserting them.

The invention will now he described in detail in connection with the accompanying drawing. in which i Fig. 1 is a perspective View of :1 connect in plug according. to the prcterred embodiment of the invention;

Fig. 2 is an elevational View of the same Plug; Y

Fig. 3 is a right elerzitional View of the plug shown in Fig. 2;

Figs. 4 and 5 are cross sectional views taken along the lines H and 5-5 respectively ot Fig. 2;

Fig. 6 is an end view of the plug handle taken along th line 66 of Fig. 2 showing, in cross section, a pair of pin type cord tips connected to the plug;

Fig. 7 is an end View similar to Fig. 6, but showing the cord tips in the initial inserted position for ing the manner in which the cord tips are manipulated in the operation of inserting them in'the plug;

Fig. 8 is an elevational view similar to Fig. 2 except that one-half of the handle has been removed in order to more clearly illustrate the interior construction. This view also shows a pair of pin type cord tips in th initial position;

Fig. 9 is an inside elevational view of onehalf of the plug handle,' being that part of the handle which has been removed in Fig. 8; and

Fig. same as Fig. 8 shown in the? The contectin portion prises a tip 1 en sleeve 2 The ti tends tirough the sleeveQ and is insulatedtherefrom by a husliing of suitaole insulating material. To the lower end of the plug portion there are connected a. pair of resilient conducting n emhers 3 and i having the form of leaf springs. These conducting 10 is sin elevations], View exactly the final inserted positions.

of the plug coinoif-the usual members are insulated from each otherhy means of an insulating wesher 5, and are connected respectively to the tip nd sleeve. The iree end portions of the c onducting members 3 and 4 are sliehtly bent, as is best illustrated in Fig. 8'; and are each provided with an aperture 0 suitable size to permit the insertion of a type cord tip iii, 11

which isvlikewise c early i lustrated in Fig.-

8. The plugis provided with a holiew handle of molded insulating niaierial eem rising the two identical portions 6 and 7 w ich heldtogether loy a clearly shown. the resilient conducting memhers 3 and 4 ere disposed inside the handle.

Each handle tlii; and is so formed that handle is provided with two slots 9 and 10 which define n pair of heel:

- first step in' the purpose of illustrat exeeptthst the cord tips are term; 1 has a shank portion. which ex vtvherein saidconductor and screw 8; As is assess? like projections or shoulders 6' and 7". The form of the slots 9, 10 and the projections 6, I is clearly shown in the perspective View, Fig. 1.

'Figs. 7 and 8" illustrate rery clearly the connectinga pair of pin type cord tips 11. 11 to'the plug. After the cord tips areinserte'd in the ape 'tures in the free end portions of the resilient conducting members 3, 4, they are manipulatedthrough the slot 9-into the position shown in Figs. 2,- 3, ti and 10. Inthe final position as shown in these figures the cord tips are held. within the hooks of shoulders 6', 7 and are firmly held against these shoulders by the tensionof the resilient conducting members .3, 4. it should he noted that theapertures in the free ends of the resilient conducting thereon of the resilient 'oonduoti'ngmembers.

The cord tips can be eiisily' released from the plug by a reverse manipulation through the slots 9, 10m the position shown'in Figs. 7 and 8, in which position they may be easily withdrawn; v Iclsiinz "i i 1. A connecter plug of thejtel'ephone. type comprising an insulating handle a" conduct ing plug portion retaitiedsby saidliandle, a tiex'hle conductor electnic'allyiesflooiated with said plug portion andjdisp osedwithin said insulating handle, saidcoiiductor being adapted to engage acord tipysaid iiisuliitinghandle being providedfwith a. slot and a shoulder projecting into said sl t. said slot being proportioned permittiie insertion theretlirough' of a cord tip into 'engugement with said conductor and to permit the cord tip being nianpulated into a position with respect to ductorand said shoulder cooperate to secure the cord tip in engagement ivith said conductor.

' :52. A releassble electrical oonnect'er comprising a hollowmemberga resilient conductor disposed within said member, said conductor having an aperture-adaptedio reeeive a cord tip, said member bei'n' pro sided with a slot defining a sho'ul er integral with said member said slotx be'ing proportioned to permit th insertion therethrough oi a cord tip into siiid aperture and to permit the cord tipbeingmani'ulated into a position with respect to said oulder said "shoulder cooperate to secure the cord tip in engagement with said conductor s 3. A releasable electrical conneoter comprising a holiowiinember, a. leaf spring consaid shoulder wherein "said con-' .ductor disposed within said-member and se- -cured oileendf oortion. said conductor be 139 ing apertured at its end portion to receive a cord ti ,said member being provided with a slot de ing a shoulder integral with said member, saidslot being'proportioned to per- 5 unit the insertion therethrough of a cord tip into said aperture and to permit the cord tip being manipulated into a position with respect to said shoulder wherein said conductor and said shoulder cooperate to secure 1 the cord tip in engagement with said conductor. v

4. In a connecterplu ofthe telephone type, a contact ortion a apted to be inserted in a jack, sai contact portion comprising tip -and sleeve conductors, a handle enclosing said contactportion, resilient conductors within said handle, said resilient conductors I being connected respectively to said tip and,

"sleeve conductors, said handle being r0 20 vided with-two slotsthrough each of w ich La pin type cord tip may be inserted into engagement with one of said resilient conduc- 4 tors, said slots each having a shoulder therein behind which the cord tip may bemanipu- 'lated after being inserted into the slot, said shoulder serving toihold said tip from disengagement with saidresilient conductor said resilient conductor serving to hold,

said cord tip behind said shoulder;

5'. In a 'connecter plug of the telephone type, a plug portion comprising tip and sleeve conductors adapted to be inserted in a spring jack, a two-part hollow handle for said plug, a pair of I resilient conducting members disposed .within said'handle and connected respectively with said tip and sleeve. conductors, eachpf said conducting members being apertured to receive a pin type cord tip, eac ofithe two parts of said fl'handle being providedfgwith a slot defining shoulder-,each of said shoulders being logated adjacent one ,of 'said conducting members, said slots being similarly proportioned to permit the insertion theret rough of a pin type cord 'tip into the aperture in the resnectivelrassociated conducting member, I

and to permit the' manipulation oi the cord i tip into a position with respect to the shoulder wherein the cord tip is held by the conducting member and shoulder conjointly whereby the cord tip is firmly secured in contact with the conducting member.

6. In a connecter plug of the telephone type, a plug portion comprising tip and sleeve conductors adapted to be inserted in a s ring jack, a two-part hollow handle for sai plug, a pair of resilient conducting members disposed within said handle and connected respectively with said tip and sleeve conductors, each of said-conducting members being apertured to receive a pin type cord tip, each of the two parts of said handle being provided, with ya slot defining a hook-shaped shoulder, each of said shoulders being located adjacent one of said con- "ducting members, said slots bein suitably proportioned to permit thevinsertiontherethrough of apin type'cord tip into the respectively associated conducting member 4 i and 'to'permit the manipulation of the cord tip after such insertion to a position inside the hook of the shoulder whereby the cord v tip is firmly secured bythe coaction of the conducting'member and. shoulder. 7. In a connecte'r plugtcf the telephone type, a contact portion adapted to be, inserted in a spring jack, said-contact portioncomprising tip and sleeve conductors, a handle to which said contact ortion' isse-r cured, resilient conductors wit ii -said handle, said resilient conductors being connected' respectively to said. ti "and sleeve conductors, said handle havingslotsthereid adapted to receive pin type cord tips, ein l i.,' slot having therein a shoulder behind whie a cord tip may be manipulatedafter it is in serted into the slot, each of said resilien conductors cooperatingwith' a correspond ing shoulder to hold a pin typecordtip-in engagement with said.'resilient-;condn ton In testimony whereof I ailixhxfsigiigit WZSI -PAQEHR" 

